Machine for forging horseshoe-nails or other articles.



' Patented Mar. 25, I902.

(Application filed Jan. 15. 1902.!

5 Sheets-She'et I.

(No Model.)

liwenlor: flfcnr .4. machine",

Jilly.

m w mw w O N m 1 m ifm -wr E w. w k N I. N 4 W M n QM mN Ww/L. kw co m "o I I u L1 I||| II- my%\ 0 w I, r Q E New w n Q h Wmm I l H un l N IW W iv w Q n w x .I h ww Ma 1 MQV \bm No. 695,984. Patented mar. 25, I902;

n. A. WILLIAMS. MACHINE FOR FORGING HORSESHOE NAILS OR OTHER ARTICLES.

(Application filed Jan. 15, 1902.!

5 Sheets-$heei 2.

(No Model.)

No. 695,984. Patented Mar. 25, I902.

H. A. WILLIAMS. MACHINE FUR FORGING HDRSESHOE NAILS OR OTHER ARTICLES.

(Application filed Jan. 15. 1902.]

(No Model.) 5 Sheets-Sheet 3.

mbwsvscs:

No. 695,984[ Patented Mar. 25, I902.

II. A. WILLIAMS.

MACHINE FOR FORGING HORSESHOE NAILS OR OTHER ARTICLES.

(Application filed Jan. 15, 1902.)

(No Model.)

5 Shoe ts-Sheet 4.

ab J ZQQ Jinry fl.

w m I No. 695,384. I Patented Mar. 25, I902. n. A. WILLIAMS.

MACHINE FOR FOBGING I-IORSE SHOE NAILS OR OTHER ARTICLES. (Application filed Jan. 10. 1902. (No Model.)

5 Sheets-Shea! 5 Uirn STATES PATENT Orrrcn.

HENRY ALEXIS XVILLIAMS, OF QUINCY, MASSACHUSETTS, ASSIGNOR TO PUTNAM NAIL COMPANY, OF BOSTON, MASSACHUSETTS, A CORPO- RATION OF MASSACHUSETTS.

MACHINE FOR FORGING HORSESHOE-NAILS OR OTHER ARTICLES.

SPECIFICATION forming part of Letters Patent No. 695,984, dated March 25, 1902. Application filed January 15, 1902. Serial No. 89,917. (No model.)

To aZZ whom, it may concern:

Be it known that I, HENRY ALEXIS WIL- LIAMS, a citizen of the United States, residing at Quincy, in the county of Norfolk and State of Massachusetts, have invented certain Improvementsin Machines forForgingHorseshoe-Nails or other Articles, of which the following is a specification.

This invention relates to improvements on the machine for forging horseshoenails and other articles for which Letters Patent of the United States were granted to me May 16, 1899, No. 625,229, and June 12, 1900, No. 651,586; and my invention consists in an automatic stop-motion of novel construction by means of which the machine will be instantly stopped when any one of the nail-blank conductors becomes clogged by the lodgment therein of a nail-blank or other obstruction. The stop mechanism employed in the machine described in the aforesaid patent, No. 625,229, was tripped by the movement to one side of the pivoted conducting-tube through which the nail-blank dropped from one pair of rolls to the pair next beneath, which movement in the arc of a circle was effected by the descent into said tube of a nail blank or blanks immediately following one lodged in the tube and obstructing the same, the additional blank or blanks as they were forced into the tube by the rolls above exerting a pressure on said tube and causing it to be moved to one side on its pivot to release the mechanism for'stopping the machine. This construction was, however, open to the objection that it often allowed several nailblanks to be forced by the rolls down into the tube and tightly wedged therein before it was moved sufficiently to elfect the stoppage of the machine, rendering it necessary to remove the tube and take it apart to clear it of the nail-blanks, which were often so tightly wedged or jammed together as to break or injure the tube, which thus required frequent repairs. Furthermore, the stopping of the machine while the conducting-tube was being removed and replaced by another involved the loss of much valuable time,thereby reducing the output of the machine. To overcome these difficulties is the purpose of my present invention, which consists in a stop mechanism adapted to be controlled by the reciprocating spring-pressed nail-blank pusher described in my aforesaid patent, No. 651,586, which pusher enters the conductingtube above each blank and instantly forces it down to the bottom of the dies in the rolls as soon as the latter are in a position to receive it. In the machine herein described the stop mechanism is so constructed and applied that it will be tripped to instantly stop the machine whenever the blank pusher is prevented by any obstruction in the tube from descending to the full limit of its normal downward movement, thus eifectually preventing the entrance of any more blanks until the obstruction has been removed.

In the accompanying drawings, Figure 1 is a horizontal section of a nail-forging machine, showing a pair of its die-grooved rolls, the nail-blank-conducting tube leading thereto, the nail-blank pusher cooperating therewith, and the stop-motion mechanism controlled by said pusher. Fig. 2 is a sectional elevation of a portion of the front of the machine, some of the parts being removed to show the mechanism behind the same. Fig. 3 is a perspective view of a portion of the mechanism for actuating the nail-blank pusher, together with a portion of the stop-motion mechanism controlled thereby. Fig. 4 is a perspective View of one of the nail-blank-conducting tubes and the nail-blank pusher which cooperates therewith. Fig. 5 is a detail of the outer end of one of the brackets through which the droprod passes. Fig. 6 is an enlarged elevation of a cam and parts adjacent thereto similar to that shown in Fig. 3, but adapted to be used in connection with a pair of rolls at right angles to a pair with which the mechanism shown in Fig. 3 would be connected. Fig. 7 is a similar elevation showing the parts in a different position. Fig. 8 is a detail of the pivoted end of the drop-lever and parts adjacent thereto. Fig. 9 is a detail of the stopmotion drop-lever and the levers which trip the same. Fig. 10 is an enlarged vertical section on the line 10 10 of Fig. 1. Fig. 11 is a vertical section on the line 11 11 of Fig. 10.

In the said drawings, 20 represents the we framework of the machine of the proper shape to support the working parts.

21 21 denote the die-grooved rolls of the machine, which are arranged in pairs beneath each other, the two rolls .of a pair being connected to revolve together .by. gears 22 22 and each pair being arranged at right angles to the pair immediately above or belowit in the same manner as shown and described in my aforesaid-patent, No. 625,229. The rolls 21 21 are supported in boxes 23, mounted in housings 24, secured to the vertical wall of the framework 20. The shaft of one roll of each pair is elongated and connected with a shaft 25 in line therewith bymeans of a coupling 26, and each of said shafts 25'is provided with a gear 27, which meshes with another gear 28, receiving motion by means of shafts and gears from the driving-shaft 29 of the machine.

.30 30 represent the conducting tubes through which the nail-blanks or partly-made nails pass from one pair of die-grooved rolls tothe pair next beneath. Each of the con-. ducting-tubes 30 is provided on one side with a narrow longitudinal slot 31, Fig. 4, enlarged at its upper end at 32 for the entrance of the nail-blank pusher 33, to be presently described.

In suitable guide-grooves 19 in each of the.

i the nail-blank pusher 33, consisting of a main upper.portion having a narrow neck 37 extending inwardly and downwardly therefrom at'an angle, as shown in-Fig. 4, and provided at its end with a head 38, which is adapted when the slide 34 descends to enter and pass through the enlargement 32 of theslot 31 after the nail-blank or partly-made nail has passed down the conductor with its lower or head portion in contact with the rolls 21 21,

4O isa spring secured to the slide 34 and'arranged to constantly exert an inward pressure. on the pivoted nail-blank pusher, so that its head 38 will. enter and pass through the opening 32 when brought into line therewith, the narrow neck 37 fitting the narrow portion of the slot 31 and passing down through the same as the pusheris carried down by the slide 34't'o bring its head 38 into contact with the upper end of the nail-blank. On the ascent of the slide 34 the pusher is withdrawn from the tube 30 against the resistance of the spring by the contact of the inner edge of the inclined neck 37 with the upper rounded end of the slot 31, on which it rides as it is drawn upward, the head 38 passing out of the opening 32 and bearing against the outside of the conducting-tube 30vduring the remainder of the upward movement of the slide .34, thus leaving the interior of the tube 30 free and clear for the passage of the next nail-blank to the rolls beneath.

The mechanism by which the slide 34 is reciprocated'to produce the desired movements of the nail-blank pusher and cause. the latter to exert a spring-pressure on the nail-blank when the latter is in contact with the rolls will now be described.

42 is a horizontal shaft mounted in bearings in a bracket43, secured to the adjacent housing 24. To this shaft is secured an arm 44, the inner end of which engages a slot 45 in the slide 34, as shown in Fig. To one end of the shaft 42 is secured a forked crank-' arm 46, which is engaged by a pin 47 on a lever 48, fulcrumed at 49 on the bracket 43 and provided at the end of its lower arm with a ca1n-roll50, which is acted on by a cam 51 on the shaft 25, connected with one ofthe diegrooved rolls 21, the cam-roll being kept in contact with the cam during the greater portion of its revolution by a spring 52, secured to the bracket 43 and exerting a downward pressure on the upper arm of the lever 48. As the cam revolves the outer end of. thelever 48 is raised against the resistance of the spring 52 and through the medium of the crank-arm 46, shaft 42, and arm 44 raises the slide 34 into the position shown in Fig.4, thus leaving the tube 30 clear for the passage of the blankto the rolls 21 21 beneath. As soon as the blank or nail has dropped onto the rolls the cam 51 permits the spring 52 to depress the outer end of the 1ever48,which through the connections described instantly depresses the slide 34, causing the head 38 of the nail-blank pusher to pass into the conducting-tube 30 through the opening 32 and descend untilit reaches the upper end of the nail-blank, upon which it will rest with a spring-pressure, due to the action of the spring 52, the 02111151 in its revolution then passing for a short time entirely out of contact with the cam-roll 50, leaving said spring 52 free to exert its full force through the medium of the lever mechanism upon the nail-blank pusher, which in turn exerts a downward spring-pressure on the nail-blank during the time that the-headforming recesses 53 in the diesof therolls'21 21 are being brought around into position to receive the lower end of the blank to form the head of the nail. The moment that the recesses 53 of the dies reach the lower end of the blank it is instantly carried down to the bottom of said recesses by the strong springpressure of the nail-blank pusher on its upper end, so that the blank is absolutely certain to reach its proper position in said dies without regard to the speed with which the rolls may be rev0lving.- As the cam which controls the operation of the lever mechandown between the rolls the nail-blank pusher 33 is raised out of the tube 30, and the operation continues as before. The lever mechanism of the slide belonging to the next conducting-tube beneath or above is arranged at right angles to that just described, as shown in Fig. 2, and in this case the arm etl engages a slot in the slide at right angles to that of the slide above or beneath it. 7

The above-described nail-blank-pushing device and its operating mechanism is substantially the same as that shown and described in my aforesaid Patent No. 651,586 and cooperates with and controls the stopmotion which forms the subjectmatter of my present invention and which will now be described, said stop-motion acting to instantly stop the machine if the nail-blank pusher should fail to reach the normal limit of its downward movement by reason of the conducting-tube becoming clogged by a nailblank or other obstruction lodged therein.

55 is a vertical drop-rod extending from near the bottom of the machine to a point near the top of the same, said rod being adapted to slide through suitable openings 56 in supporting-brackets 57, the rod being normally held up in the position shown inFigs. 2, 3, 6, and 7 by a pin 58 projecting therefrom at right angles and resting on the top of the bracket 57, from which projects a stop-pin 59, which serves to keep the pin 58 close to an open slot 60, extending outward from the opening 56 to the edge of the bracket, as

shown in Figs. 1, 3, and 5, so that when the drop-rod is turned axially, as will be hereinafter explained, to bring the pin 58 in line with the slot 60 it will drop by its own gravity onto a tripping-lever, to be hereinafter described. To the cam 51, which actuates the nail-pushing mechanism, is secured or made integral therewith a plate 61, having a shoulder 62, and near the outer edge of this plate is pivoted at 63 a curved lever 64, lying against the inner side of the plate and carrying at its free end a pin 65, said lever having a tailpiece 66 located on the opposite side of the plate, and against which bears a spring 67, which serves to keep it normally in contact with a screw 68, as shown in Fig. 6, said screw passing through an ear 69, projecting from the plate 61, and forming an adjustable stop, whereby the position of the lever 64: may be changed to vary the normal distance of the pin 65 from the center of the cam, so that it will describe a larger or smaller circle as it is carried around with the cam.

is a short arm which projects laterally from the drop-rod 55 and is adjustably secured thereon by means of a screw 71, the normal position of the arm 70 being such that the pin 65 of the lever 64 will as it revolves pass behind and clear the thin portion of this arm, as shown clearly in Figs. 3 and 6, the curved lever (it being also normally held by the stop-screw 68 in such position that it will not strike the cam-roll 50 of the lever 18 during the ordinary operation of the machine when the nail-blanks are passing properly through the conductingtube 30. When, however, the conducting-tube becomes obstructed bya nail-blank failing to properly enter the dies of the rolls beneath, as shown in Fig. 2, or becoming otherwise lodged or jammed within said tube, so that the pusher 33 cannot be carried down by the spring 52 to the limit of its normal downward movement, the cam-roll 50 at the end of the lever 48 will then occupy a position farther out from the center of the cam, as shown inFig. 7, which brings it into the path of the lever 64, causing the latter to be forced outward, as shown in Fig. 7, carrying its pin 65 into a position to strike the outer or front side of the arm 70 as the cam revolves and partially rotate the drop-rod 55, which will cause its pin58 to be brought into line with the slot 60 of the bracket 57, when the rod, being no longer supported by the pin 58, will drop by its own Weight, its lower end then striking the flattened end 73 of a tripperlever 74, which is pivoted at 75 to a long droplever 76, fulcrumed at 77, Figs. 1 and 8, to a post 78, said lever 76 being supported against its own weight, as shown in dotted lines in Fig. 2, by a depending arm 79, pivoted at- 80 to one of the housings (shown in dotted lines) and provided with a notch 81, which is engaged by a pin 82, projecting from said drop-lever, the arm 79 being drawn inward by a spring 84, connected therewith,to keep the pin 82 within the notch 81. When the flattened end 73 of the tripper-lever 7a is carried down by the drop-rod falling upon it, its opposite end, which. is bent at right angles, asshown in Fig. 9, acts on the arm 79 and forces the same outward against the resistance of the spring 84, thus releasing the drop-lever 7 6 and allowing it to fall into the position shown in full lines in Fig. 2.

The spring-pressed nail-blank pusher for each conducting-tube is prov-idedwith a stopmotion, as .above described, there being a drop-rod at the front of the machine, as shown in Fig. 2, for the pairs of rolls parallel therewith and another similar drop-rod on the right-hand sideof the machine, as shown in Figs. 1 and 2, for the alternate pairs of rolls, which are parallel with said right-hand side, each drop-rod having a laterally-projecting arm 70 for each stop-motion belonging thereto. The drop-rod, which is located on the right-hand side of the machine, is adapted to fall onto the flattened end of a second tripper-lever 86, Figs. 1, 2, and 9, the outer bent end of which lies beneath the bent end of the tripper-lever 74, which is thus raised to trip the drop-lever 76 when either of the drop-rods is released and allowed to descend, as above described.

As the nail-blank is quite short when it enters the upper conductor on its passage to the first or upper pair of rolls and gradually increases in length as it is drawn down through the several pairs of rolls beneath, it will be obvious that each of the nail-blank pushers 33 of the conductors beneath will be carried down. by its spring a less distance than the one immediately above it, and therefore it I the pin 65 as the cam revolves, the mechanism .being in this manner nicely adjusted, so that any obstruction of any one of the conductingtubes which will prevent its pusher from de y scending to its proper normal limit will at shaped ends 96.

once release one or the other of the drop-rods.

To the short arm of the lever 76 is pivoted a link 88, Figs. 1, 8, and 10, through an aperture 89, at the bottom of which passes a latch 90, pivoted to a hand-lever 9l, fulcrumed to the base of the machine and adapted to bear against a projection 92 on a bracket 93, as shown in Fig. 10. To the hand-lever 91 is pivoted a rod 94, to the inner end of which is secured a curved piece 95, having wedge- The rod 94 is provided with a shoulder 97 and slides horizontally within a shouldered aperture 98 in the bracket 93, where it is encircled by a spring 99, which serves to force the rod and Wedge-piece 96 inwardly, when the latch 90 is lifted by the link 88 out of contact with the stop or. projection 92, the inward movement of the rod being limited by the contact of a pin 100 thereon with the side of the bracket 93.

101'is a disk keyed to the driving-shaft 29, as shown in Figs.1, 10, and 11,and lying closely against the hub 102 of the driving-pulley103, which is free to turn on the shaft 29 when not connected therewith by a pin l04,sliding in'the disk 101 and adapted to enter one of apair of recesses 105 in the hub 102, a flat curved spring 106., secured to the disk 101, acting on a projection at the outer end of the pin 104 to force the latter into the recess 105, and thus lock said disk to thehub 102,whereby ,motion is communicated to the driving-shaft.

The pin 104; is provided with a rectangular head 107, which lies in the path of the curved wedge-piece 95 when the latter is forced inward by the action-of the spring 99, the end of the wedge-shaped piece then passing between the head 107 and the face of the disk 101 and forcing the pin 104 outward to withdraw it from the recess 105, when the driving-pulley 103 will be disengaged from the driving-shaft, thus instantly stopping themachine. The release of the rod 91 is effected by the fall of the drop-lever 76, which lifts the latch 90, when the rod 94 and wedgepiece 95 will be forced inward by the spring 99, causing the disk 101 on the driving-shaft to be unlocked from the hub of the drivingpulley 103, as above described. After the conducting-tube has been cleared of the obstruction which has produced the operation of' the stop-motion, as above described, the rod 94 and wed ge-piece 95 are drawn back by the hand-lever 91 until the latch 90 catches against the stop 92, when the spring 106 will force the pin against the face of the hub 102, so that it willenter one of the recesses 105 in the said hub as the latter revolves, thus again setting the. machine in motion.

By thus providing the machine with a stopmotion directly under the control of the nailblank pushers, so that the failure of any one of the latter to reach the limit of its normal downward movement will cause the machine to be instantly stopped, all liability of a conducting-tube being broken or injured by a number of consecutive blanks being crowded or jammed into it before the motion of the.

The above-described clutch mechanism,

which is operated bythe drop-lever todisconnect the driving-pulley from the drivingshaft, forms no part of my present invention, and I do not, therefore, limit myself to its use, as any other suitable mechanism adapted to be operated by the drop-lever for the purpose of disconnecting the power from the driving-shaft may be employed without departing from the spiritof my invention.

What'I claim as my invention, and desire. to secure by Letters Patent, is

1. In a forging-machine, the combination with apair of die-grooved rolls and a conducting-tube leading thereto, of a reciprocating spring pressed blank pusher cooperating therewith, means for actuating the same,.and a stop-motion controlled by said pusher, whereby the failure of the pusher to descend to the limit of its normal downward movement by reasonof the conducting-tube being,

spring-pressed blank-pusher adapted to enter Ioa said cond uctor after a blank has been dropped therein and exert a yielding pressure on said blank, lever mechanism for actuating said pusher, and a stop-motion controlled by and adapted to be tripped by said pusher-actuating mechanism when the pusher is prevented from descending to the normal limit of .its downward movement.

- 3. In a forging-machine, the combination witha pair of die-grooved rolls and a conducting-tube leading thereto, of a reciprocating sp ring-pressed blank-p usher adapted to enter said conductoraftera blank has been dropped therein and exert a yielding pressure on said blank, lever mechanism for actuating said pusher, a cam for actuating said lever mechanism, a spring-pressed lever pivoted to said ing adapted to be swung outward by contact with the pusher-actuating mechanism when said pusher fails to descend to its normal limit, a drop-rod and means for supporting the same, said drop-rod having a laterallyprojecting arm adapted to be struck by the laterally-projecting pin of the cam-lever when swung outward from its normal position, and stop-motionmechanism adapted to be tripped by the descent of the drop-rod to stop the machine.

l. In a forging-machine, the combination of a pair of die-grooved rolls, a conducting.

tube leading thereto, a spring-pressed reciprocating pusher adapted to enter said conductor after a blank has been dropped therein and exerta pressure on said blank,lever mechanism for raising the pusher and withdrawing the same from the conductor, a cam for actuating said lever mechanism, a springpressed lever pivoted to said cam and provided at its free end with a laterally-extending pin, a drop-rod and means for supporting the same, said drop-rod having a laterally-projecting arm adapted to be struck by said pin to turn said drop-rod and release the same when said cam-lever is forced outward by contact with the lever mechanism connected with the pusher,a drop-lever,'a notched arm for supporting the same, a tripper-lever for releasing the drop-lever, said tripper-lever being actuated by the descent of the droprod thereupon, and means controlled by the drop-lever for arresting the movement of the drivingshaft.

5. In a forging-machine, the combination with the blank-pushei actuating cam, of a spring-pressed lever pivoted thereto and car-' rying at its free end a laterally-projecting tripping-pin, and an adjustable stop for determining the normal position of said lever and the distance of its tripping-pin from the center of the cam.

6. In a forging-machine, the combination with the blank-pnsher-actuating cam and a spring-pressed lever pivoted thereto and "carrying at its free end a laterally-projecting tripping-pin, of a drop-rod provided with an arm vertically adjustable thereon to bring it into the path of the tripping-pin when the latter is moved outward beyond'its normal position, said tripping-pin being adapted to turn the drop-rod to release the same.

7. In a forging-machine, the combination with the blank-pusheractuating cam, of a spring-pressed lever pivoted thereto and'carrying at its free end alaterally-projecting tripping-pin, an adjustable stop for determining the normal position of said lever and the distance of its tripping-pin from the center of the cam, a drop-rod provided with an arm vertically adjustable thereon to bring it into the path of the tripping-pin when the latter is moved outward beyond its normal position, said pin being adapted to turn the drop-rod to release the same, and stop-motion mechanism adapted to be tripped by the descent of the drop-rod.

8. In a forging-machine, the combination with the vertically-sliding drop-rod provided with a laterally-extending pin, of, a bracket provided with an opening for the pas'sage of said rod and having a slot communicating with said opening through which said pin may pass when brought into line therewith by the axial movement of the rod, means for turning said rod, and stop-motion mechanism adapted to be tripped by the descent of the drop-rod.

9. In a forging-machine, the combination with a vertically-sliding drop-rod having a laterally-extending pin, of a bracket provided with an opening for the passage of the droprod and forming a rest for its pin," whereby said drop-rod is held suspended, saidbracket having a slot through which said pin I may pass when brought into line therewith by the partial rotationof the drop-rod, and a pin projecting from the upper side of the bracket near said slot and forming a stop for the droprod pin. 7 10. In a forging-machine, the combination with the drop lever and meanscontrolled thereby for arresting the movement of the drivingshaft,of a notched arm for supporting said drop-lever, a tripper-lever pivoted to the drop-lever and adapted to act on the notched arm to release said drop-lever, a verticallysliding drop-rod adapted to fall upon and actuate the tripper-lever, and means for supporting and releasing the drop-rod.

11. In a forging-machine, the combination with the drop-lever and the notched arm for supporting the same, of a tripper-lever pivoted thereto and adapted to act on the notched arm to release the drop-lever, a second tripper-lever extending beneath and adapted to actuate the first-named tripper-lever, a droprod for eachof said tripper-levers, and means for releasing said drop-rods, whereby the descent of either one will effect the release of the drop-lever to stop the machine.

Witness my hand this 10th day of'January, A. D. 1902.

HENRY ALEXIS WILLIAMS 

